The lingering strength of your attack drives the target to the ground unless it keeps its distance from you and your allies.

Encounter   ✦     Primal, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Strength vs. AC

Hit: 4[W] + Strength modifier damage. Until the end of your next turn, if the target enters a square adjacent to you or any of your allies, it falls prone.

  Lifespirit: Each ally within 3 squares of you can make a saving throw.

Published in Primal Power, page(s) 103.